Answer:
i. New firms will enter the market
iii. In the long run, all firms will be producing at their efficient scale
Explanation:
In the competitive market barriers to entry will be low as there is no monopoly. The firms in the market are experiencing increased profitability as a result of increased demand so the market will be attractive for new firms. This will result in new firms entering into the market. In the short run.
In the long run as more firms enter the market, the firm's will need to produce at efficient scales because of high competition, with the aim of minimising cost.